Method for the refining of lead

Details Method for the refining of lead Method for the refining of lead

1989-08-28

1990-03-27

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 93DA, C22B 1306

Patent

active

049117556

ABSTRACT:
Lead that forms dross upon melting is refined by treatment with refining agents consisting essentially of calcium metal and aluminum-silicon eutectic alloy. The refining agents are mixed into a bath of molten lead preferably at 600.degree. C., the bath is cooled to preferably 450.degree. C., and sodium hydroxide and sodium nitrate are added to remove the refining agents. The formed dross is skimmed and refined lead is recovered. The refined lead forms less dross upon remelting.

REFERENCES:
patent: 4042228 (1977-08-01), Ward et al.

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